An approach to obtain the structural information from the electrical resistivity well logging curves

Yıl 2019, Cilt: 158 Sayı: 158, 345 - 352, 25.04.2019

Doğan Can Karataş Uğur Zaman Emin U. Ulugergerli

https://doi.org/10.19111/bulletinofmre.451546

Öz

In well logging measurements,
the effect of the fluid in the well on the resistivity log curves and the investigation
depth/distance for 16 and 64 inches logs were investigated in two-dimensional numerical
modeling with the assumption that underground structures are symmetrical. Structural
information was obtained via recovering the real resistivity values by using the
inversion rather than empirical approaches. Generally, in the case of using the
conductive fluid (1 ohm.m<) depending on the ratio of unit thickness (k) with
respect to the length of log (l) (i.e. k/l), the insulating formations produce an
“M” shaped signs for k/l<1 and appears as the conductive unit that cause fictitious
structures in the data. The depth/distance of the research on the other hand causes
deviations in the resistivity of structure due to tool length and distance. By
the help of the inversion study one of the possible models is obtained. Contribution
of this method to such studies is the reveal of compatibility of the resistivity
model and data that usually neglected in other approaches.

 

Anahtar Kelimeler

resistivity well log modelling, Resistivity well log, resistivity normal log, resistivity well log research depth, resistivity well log inversion

Kaynakça

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